Date: Tue, 23 Sep 2008 14:45:10 +0000 (UTC) From: "David E. O'Brien" <obrien@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/conf files src/sys/fs/tmpfs tmpfs.h tmpfs_subr.c tmpfs_vnops.c src/sys/i386/i386 bios.c src/sys/ia64/ia64 efi.c sal.c src/sys/libkern memcmp.c src/sys/mips/mips support.S src/sys/sys libkern.h Message-ID: <200809231446.m8NEkQev007507@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
obrien 2008-09-23 14:45:10 UTC
FreeBSD src repository
Modified files:
sys/conf files
sys/fs/tmpfs tmpfs.h tmpfs_subr.c tmpfs_vnops.c
sys/i386/i386 bios.c
sys/ia64/ia64 efi.c sal.c
sys/mips/mips support.S
sys/sys libkern.h
Added files:
sys/libkern memcmp.c
Log:
SVN rev 183299 on 2008-09-23 14:45:10Z by obrien
The kernel implemented 'memcmp' is an alias for 'bcmp'. However, memcmp
and bcmp are not the same thing. 'man bcmp' states that the return is
"non-zero" if the two byte strings are not identical. Where as,
'man memcmp' states that the return is the "difference between the
first two differing bytes (treated as unsigned char values" if the
two byte strings are not identical.
So provide a proper memcmp(9), but it is a C implementation not a tuned
assembly implementation. Therefore bcmp(9) should be preferred over memcmp(9).
Revision Changes Path
1.1334 +1 -0 src/sys/conf/files
1.15 +1 -1 src/sys/fs/tmpfs/tmpfs.h
1.19 +1 -1 src/sys/fs/tmpfs/tmpfs_subr.c
1.24 +1 -1 src/sys/fs/tmpfs/tmpfs_vnops.c
1.75 +1 -1 src/sys/i386/i386/bios.c
1.6 +1 -1 src/sys/ia64/ia64/efi.c
1.16 +1 -1 src/sys/ia64/ia64/sal.c
1.1 +53 -0 src/sys/libkern/memcmp.c (new)
1.2 +0 -2 src/sys/mips/mips/support.S
1.59 +1 -6 src/sys/sys/libkern.h
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200809231446.m8NEkQev007507>